针对植被基材存在的强度低、碱度高以及制备成本高等问题, 引入聚丙烯酰胺保水剂对磷石膏基植被材料进行改性.通过保水剂作用机理分析, 表明保水剂的掺入在未改变基材晶相结构的同时, 改善了基材保水性, 使其吸水率高达47％, p H值降低4.3％, 能缩短植被基材的发芽时间和提高基材根系穿透稳固力度.%In view of the problems of low strength, high alkalinity and high preparation cost of vegetation base materials, polyacrylamide waterretaining agent was introduced to modify phosphogypsum base vegetation materials. Through the analysis of the action mechanism of water-retaining agent, the experiment shows that the addition of water-retaining agent improves the water-retaining property of the substrate, and without changing the crystal structure of the substrate, making the highest water-absorbing rate of the substrate is 47％ and the pH value was reduced by 4.3％, which can shorten the germination time of the vegetation substrate and improve the penetration and stability of the substrate roots.
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